Numerical analysis and validation of spray distributions disturbed by quad- rotor drone wake at different flight speeds

作     者：Wen, Sheng Han, Jie Ning, Zhihua Lan, Yubin Yin, Xuanchun Zhang, Jiantao Ge, Yufeng 

作者机构：South China Agr Univ Engn Fundamental Teaching & Training Ctr Guangzhou 510642 Guangdong Peoples R China Natl Joint Res Ctr Precis Agr Aviat Applicat Tech Guangzhou 510642 Guangdong Peoples R China South China Agr Univ Coll Engn Guangzhou 510642 Guangdong Peoples R China Jinan Univ Sch Mech & Construct Engn MOE Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Guangdong Peoples R China Univ Nebraska Biol Syst Engn Lincoln NE USA 

出 版 物：《COMPUTERS AND ELECTRONICS IN AGRICULTURE》 (农用计算机与电子设备)

年 卷 期：2019年第166卷

页      面：105036-000页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China Guangdong Natural Science Foundation [2018A03130128] Guangzhou Science and Technology Project Leading Talents of Guangdong Province Program [2016LJ06G689] 

主　　题：Quad-rotor plant protection drone Lattice Boltzmann method Large eddy simulation Droplet drift 

摘      要：The computational fluid dynamics method based on the lattice Boltzmann method (LBM), was used to simulate the downwash flow field of a quad-rotor drone. The downwash flow fields of a quad-rotor drone at flight speeds of 1-7 m/s and flight altitudes of 1-2 m were simulated. The horseshoe-shaped vortices were successfully captured at a speed exceeding 5 m/s. In order to capture the deposition and drift distribution of droplets with different sizes in the downwash flow field of a quad-rotor drone more accurately, the Lagrangian discrete phase particle tracking method was used to simulate the trajectories of droplets with different particle sizes. By changing the flight speed, flight altitude, vertical height of the boom from the rotor, and lateral distance between the nozzles, the effects of these conditions on the droplet deposition and drift behind the fuselage were studied. The accuracy of the numerical simulation was verified by a wind tunnel test. The results of the numerical simulation were in good agreement with the data from the wind tunnel test. It is shown that the computational fluid dynamics model developed in the paper can be successfully applied to the simulations of droplet drift and deposition of a quad-rotor plant protection drone.